Stream of consciousness rationale: To answer the above question, the relevant sentence is: Jonathan Mayhew, Old West Church's second Congregational pastor, used the phrase, "No Taxation Without Representation" in a sermon in 1750.
The question and answer pair are described below.
Q: Jonathan Mayhew, Old West Church's second Congregational pastor, used the phrase, "No Taxation Without Representation" in a sermon in 1750. The phrase revives a sentiment central to the cause of the English Civil War following the refusal of parliamentarian John Hampden to pay ship money tax. "No Taxation Without Representation," in the context of British American Colonial taxation, appeared for the first time in the February 1768 London Magazine headline, on page 89, in the printing of Lord Camden's "Speech on the Declaratory Bill of the Sovereignty of Great Britain over the Colonies."

Answer this question based on the passage: who made the slogan no taxation without representation?
A: Jonathan Mayhew